Flange of automobile engine exhausting system and production process of flange

Abstract

The invention provides a flange of an automobile engine exhausting system. The flange comprises a flange body, a bottom plate, a connecting part, a top plate, holes, a bottom-end hole and a top hole, wherein the flange body is provided with the bottom plate; the bottom-end hole is formed in the center of the bottom plate and two holes are formed in each of two sides of the bottom-end hole; the upper end of the bottom plate is connected with the lower end of the connecting part; the upper end of the connecting part is connected with the top plate; the top hole is formed in the center of the top plate; a wear-resisting metal coating is plated on the surface of the flange body; the wear-resisting metal coating is prepared from the following components in percentage by mass: 0.21 percent to 0.23 percent of C, 0.13 percent to 0.17 percent of Mg, 0.62 percent to 0.65 percent of Cu, 0.45 percent to 0.48 percent of W, 0.55 percent to 0.58 percent of Ti, 5.32 percent to 5.35 percent of Cr, 0.37 percent to 0.39 percent of Ni, 0.42 percent to 0.45 percent of Mo, 0.23 percent to 0.25 percent of Co, 3.42 percent to 3.45 percent of Ca, 11 percent to 13 percent of rare earth and the balance of Fe and trace impurities; the rare earth includes the following components in percentage by weight: 5.2 percent to 5.5 percent of La, 7.6 percent to 7.8 percent of Ce, 5.2 percent to 5.6 percent of Pm, 5.5 percent to 5.8 percent of Nd, 3.1 percent to 3.3 percent of Eu, 5.5 percent to 5.8 percent of Sm and the balance of Gd.

Description

technical field [0001] The invention relates to the technical field of automobile engines, in particular to a flange of an automobile engine exhaust system and a production process thereof. Background technique [0002] Automobile exhaust system refers to the system that collects and emits exhaust gas. It is generally composed of exhaust manifold, exhaust pipe, catalytic converter, exhaust temperature sensor, automobile muffler and exhaust tailpipe. Oil system, ignition system and other faults, engine overheating, tempering, resulting in three-way catalytic converter carrier sintering, peeling off, exhaust resistance increases, therefore, the exhaust system flange needs to bear a certain pressure, the existing automobile engine law The flange is manufactured by assembly or stamping process, which saves the production cost, but the stability is poor, and the size of the flange is not uniform, which is not convenient for the replacement of parts. Contents of the invention ...

AI Technical Summary

Problems solved by technology

[0002] Automobile exhaust system refers to the system that collects and emits exhaust gas. It is generally composed of exhaust manifold, exhaust pipe, catalytic converter, exhaust temperature sensor, automobile muffler and exhaust tailpipe. Oil system, ignition system and other faults, engine overheating, tempering, resulting in three-way catalytic converter carrier sin

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